'\" t
.\"     Title: ctdb.sysconfig
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: 03/09/2023
.\"    Manual: CTDB - clustered TDB database
.\"    Source: ctdb
.\"  Language: English
.\"
.TH "CTDB\&.SYSCONFIG" "5" "03/09/2023" "ctdb" "CTDB \- clustered TDB database"
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.SH "NAME"
ctdb.sysconfig \- CTDB daemon configuration file
.SH "DESCRIPTION"
.PP
This file contains configuration that affects the operation of CTDB\&. This is a distribution\-specific service configuration file such as
/etc/sysconfig/ctdb
(Red Hat) or
/etc/default/ctdb
(Debian) and is a shell script (see
\fBsh\fR(1))\&.
.SH "GLOBAL CONFIGURATION"
.PP
CTDB_INIT_STYLE=debian|redhat|suse
.RS 4
This is the init style used by the Linux distribution (or other operating system) being used\&. This is usually determined dynamically by checking the system\&. This variable is used by the initscript to determine which init system primitives to use\&. It is also used by some eventscripts to choose the name of initscripts for certain services, since these can vary between distributions\&.
.sp
If using CTDB\*(Aqs event scripts are unable to determine an appropriate default then this option can also be placed in a relevant
\fBctdb-script.options\fR(5)
file\&.
.sp
Default: NONE\&. Guessed, based on features of distribution\&.
.RE
.SH "RESOURCE LIMITS"
.SS "Maximum number of open files"
.PP
CTDB can use a lot of file descriptors, especially when used with Samba\&. If there are thousands of smbd processes connected to CTDB when this can mean that thousands of file descriptors are used\&. For CTDB, it is often necessary to increase limit on the maximum number of open files\&.
.PP
The maximum number of open files should be configured using an operating system mechanism\&.
.PP
systemd
.RS 4
The
LimitNOFILE=\fBLIMIT\fR
option can be used in a unit/service file increase the maximum number of open files\&. See
\fBsystemd.exec\fR(5)
for details\&.
.RE
.PP
SYSV init
.RS 4
Use a command like
\fBulimit \-n \fR\fB\fBLIMIT\fR\fR
to increase the maximum number of open files\&. This command can be put in the relevant distribution\-specific service configuration file\&.
.RE
.SS "Allowing core dumps"
.PP
Many distributions do not allow core dump files to be generated by default\&. To assist with debugging, core files can be enabled\&. This should be configured using an operating system mechanism\&.
.PP
systemd
.RS 4
The
LimitCORE=0|unlimited
option can be used in a unit/service file\&.
0
disallows core files,
unlimited
allows them\&. maximum number of open files\&. See
\fBsystemd.exec\fR(5)
for details\&.
.RE
.PP
SYSV init
.RS 4
Use a command like
\fBulimit \-c 0|unlimited\fR
to disable or enable core files as required\&. This command can be put in the relevant distribution\-specific service configuration file\&.
.RE
.SH "FILES"
.RS 4
/etc/sysconfig/ctdb
.RE
.RS 4
/etc/default/ctdb
.RE
.RS 4
/usr/local/etc/ctdb/script\&.options
.RE
.SH "SEE ALSO"
.PP
\fBctdbd\fR(1),
\fBctdb-script.options\fR(5),
\fBctdb\fR(7),
\m[blue]\fB\%http://ctdb.samba.org/\fR\m[]
.SH "AUTHOR"
.br
.PP
This documentation was written by Martin Schwenke
.SH "COPYRIGHT"
.br
Copyright \(co 2007 Andrew Tridgell, Ronnie Sahlberg
.br
.PP
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version\&.
.PP
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE\&. See the GNU General Public License for more details\&.
.PP
You should have received a copy of the GNU General Public License along with this program; if not, see
\m[blue]\fB\%http://www.gnu.org/licenses\fR\m[]\&.
.sp
